Infection, usually by a virus, is the most common cause of lymph node swelling. Other causes include inflammatory diseases, abscesses, and cancer. ... This biopsy is done to find out why a node is swollen. ... Groin; Armpit; Neck; Under the jaw and chin; Behind the ears. ...
Soldering - Soldering has the same definition as brazing except for the fact that the filler metal used has a liquidus below 840Â°F (450Â°C) and below the solidus of the base metals.
Because brass and copper solder, also known as brazing rod, has a high melting temperature and is brittle, silver solder is usually used on these metals as well as on silver. All of the nonferrous metals (gold, silver, copper, brass or bronze) that have a relatively high melting temperature can be soldered with either gold or silver solder.